Furnace.



J. L. HOFFMAN.

PURNAGB.

APPLIOATION FILED 11.11.22, 1914.

Patented N 0V.` 8, 1914.

. T all/.whom it may. donnerai i I Beit known that I, Josnri-i In Horrivmiv,

a citizen ,of the'United States, residing in the city of Portland, county of Multnomah,

and State of Gregori, have inventedv certain new and useful Improvements in Furnaces, of which the following is a specification.

This invention relates to furnaces,4 and more particularly to certain improvements therein tobetter adapt them :formburning paper, boxes, and ribbish'in a5, ay vwill completely consume thfefsmolre and light particles of combustion and thereby prevent the escape to and through the chimney of unnecessary smoke, flying ash, soot, and the like. 1 y,

In department stores and other like establishments there is always a considerable amount of paper, paste-board and wooden boxes which must be burned in the furnace. rIhis rubbish will, of course, generate considerable heat, but under present arrange ments there is .cause for much objection by reason of the fact that paper ash and-soot therefrom escape into. the atmosphere. I haveconceived the idea of so constructing and arranging. a furnace that such paper and rubbish can be conveniently put thereinto and burned upon the grates thereof, with an Aoil blaze discharging above and over the same, preferably from the rear, so

that all of the smoke, ash and light carbon particles from such rubbish fire must necessarily pass through an intense oil re and thereby be completely consumed, such oil fire operating as a most effective smoke consumer. Thus all the heatunits from this rubbish can be effectively and advanta-v Figure 1 is a vertical sectional view, taken on line 1--1 of Fig. 2, through a furnace embodying my invention; Fig. 2 is a horizontal sectional view on line 2-2 of' Fig. 1; Fig. 3, is a cross sectional view taken on line 3-3 of Fig. 1.

rIhe general construction and 'arrangement of the furnace and boiler may be of any desired type. As shown here for piirposes of illustration, the boiler A and boiler pipes B are inclosed in 'the usual masonry 'which v 'l l remi-acne ycombustion from the fire-box follow the course of travel through the pipes B, "as inidicatedy by thearrowsand finally escape through D to a chimney or' other discharge.

In the iire-boxare the usual grates,'1-1, below which is the ash pit 2, with a door 3 Aopening thereinto. A. door 4 opens into the fire-box above the grates. Supply pipes 5 and 6, for oil and steam, respectively, are inserted .through the front of the furnace, as at 7,k and extend rearwardly therein upon the grates 1 1, as indicated, said pipes beat 8. In the construction here shown, the

pipe 6, to the rear of the fire-box. I-Iere they are connected' with an oil burner, as 9, extending upwardly and then forwardly, in the manner indicated, whereby the combustible mixture from the burner is discharged same to give room on the grates for burning the rubbish and other hard fuel. Across the rear of said fire-box, in front of said burner, is a back wall, as l0, Fig. 3, with air openings 11', therethrough. Mounted upon the upper ledge of-said back wall 10, and across the rear of said fire-box is a plate, as 12, through which said burner 9 projects, as indicated. Over the burner, in the middle upon said plate 12, is a box like cover 13, from under which said oil burner 9 discharges its combustible mixture, as indicated by the lines leading therefrom. Air from the ash pit below, not only passes up through the grates 1-1, in the usual manner, but also passes upwardly at the back of the ash pit and thence forwardly through the open- 1-1, in. front of the oil burner. I have also shown arranged in the fire-box and crosswise thereof, vwaterheating pipes 14, which are bish fire, or from any grate fire, as inthe summer time, when the oil fire is not in use.

the intense heat from the oil burner, I cover By this arrangement, it will be seen that grates 1-1, in the usual manner, but that the smoke and light carbon particles rising therefrom must necessarily pass through -a ing protected by a masonry box or cover, .as

oil supply pipe passes through the steam' across the lgrates and sufficiently above thepositioned so as to be heated from the rubthem with brick, or other masonry, as. 'at 15.

n g ASpecflcation of Letters Fatent; i v Patented Nqiv, 3, 1914, l Appneaaon inea Januar'yaaiaii. serial-no. 813,611. I

l.construction.. The' heat and roducts of portion of the rear of said re-box, and y ings 11, in the back'wall 10, above the grates icc In order to protect said water pipes 14 from iet rubbish of all kinds can be burned upon the very intense oil heat above, whereby they are completely consumed, and do not even i get to the boiler pipes and boiler above.

I do not limit the invention to the particular embodiment here shown for purposes of illustration, except as I may be limited .by the hereto appended claims.

claim:

1. ln combination with the firebox and grate of a furnace, an oil burner inthe rear of said firebox, above said grate, having a` forwardly directed nozzle, a plate beneath saidnozzle and through which said'burner proects with air opening therearound, a wal member in front of the burner body beneath said plate member, and a cover over the burner nozzle and open forwardly thereof, whereby said burner nozzle discharges above said plate from under said cover and entrains air from the space below the grate around its body ortion through said plate, substantially as described.

2. In combination with the `tirebox and grate of a furnace a floor-like structure arranged in said rebox at a space abovesaid grate, an oil burner in the rear of said firebox, projectin through an o ening in said floor-like mem er and provi ed thereabove with a forwardly directed nozzle, a covering over said nozzle and open forwardly thereof and from under which said nozzle discharges a wall member in front of said burner bod beneath said floor-like member and having air openings therethrough, and providing an air passageway upwardly from the space below t e grate around the burner body, substantially as described.

Signed at Portland, Oregon, January 16th, 1913. I

JOSEPH L. HOFFMAN.

In presence of- R. B. FRENCH, W. P. SMITH.

Acopies of this patent may be obtained for ve cents each, by addressingthe Commissioner ot Patents,

` Washington, D. C. 

